Re: evenly distribute services in RAC on node crash
- From: Krishna <krishna.setwin@xxxxxxxxx>
- To: Guillermo Alan Bort <cicciuxdba@xxxxxxxxx>
- Date: Wed, 18 Jul 2012 08:43:31 -0400
version: 11.2.0.3
I have 40 services - 10 on each node as preferred.
for example:
web1 service is preferred on node 1 and available on node2, node3,node4
web2 service is preferred on node 2 and available on node1, node3,node4
web3 service is preferred on node 3 and available on node2, node1,node4
web4 service is preferred on node 4 and available on node2, node3,node1
i can run a service on one node only. (due to vendor XA limitation)
Alan, I tried the following:
web1 service is preferred on node 1 and available on node2
web2 service is preferred on node 2 and available on node3
web3 service is preferred on node 3 and available on node2
web4 service is preferred on node 4 and available on node1
the problem with this, what if 2 nodes go down? eg: node1, node2 . web1
service will always be offline.
can we force the order of service failover?
Rajiv
On Wed, Jul 18, 2012 at 8:27 AM, Guillermo Alan Bort
<cicciuxdba@xxxxxxxxx>wrote:
> Krishna,
>
> you can use the available node for each service. So, you would set the
> preferred node to RAC4 on all services and then add an available node RAC1
> for 3 of them, RAC2 for 3 others and then RAC3 for the rest.
>
> With this configuration, the services will not fall back to another node
> if the "available" node failes. That means if nodes 1 and 4 fail at the
> same time, the services that have RAC1 as available node will not relocate
> to an active node.
>
> You may want to experiment, also, with having multiple available nodes but
> in a different order, I don't know how this will affect the behaviour but
> it might be worth a try.
>
> hth
>
> Alan.-
>
>
> On Wed, Jul 18, 2012 at 8:30 AM, Krishna <krishna.setwin@xxxxxxxxx> wrote:
>
>> Hi Everybody,
>> we have 4 node rac cluster.
>> Node 4 crashed. All the services on node 4 moved to node1.
>>
>> how can I evenly distribute the services instead all services going to
>> node1 ?
>>
>> for example: i have 10 services on node 4. All went to node 1.
>> i want 3 on node1, 3 on node2, 4 node3 .
>>
>> how can i achieve this?
>>
>> Any help appreciated.
>>
>> Thanks
>> Krishna
>>
>>
>> --
>> //www.freelists.org/webpage/oracle-l
>>
>>
>>
>
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